Magnetic controlling device



lc. MARSHALL.

MAGNETIC CONTROLLING DEVICE.

APPLICATION FILED oc. Ie, 1917.

1,388,658. PanIeaAug.-2s, 1921.-

Z SHEETS-SHEET l.

72 I attorno@ C. MARSHALL.

MAGNETIC CONTROLLING DEVICE. APPLICATION FILED ocT.16. 191'1.

1,388,658. PatendAug.`23,1921.

2 SHEETS-SHEET 2.

UNITED STATES PATENT oFFlcE.

cnsAa MARSHALL, or NEW Yoan, N. Y. f

MAGNETIC CNTROLLING DEVICE. I

Specicati'on of Letters Patent. Patent-ed Aug'. 23, 1921.

Application led October 16, 1917. Serial No. 196,833.

lowing is a specification, reference being had therein to the accompanying drawing.

This invention relates to improvements in magnetic controlling devices, and is adapted for use in connection with submarine mines, indicating mechanism for ships at sea, and

indicating mechanism for coast defense,

wherein the passage thereby of a metallic vessel Within certain distances will cause' the `actuation of the magnetic switch to clsea circuit to operate an indicating mechan1smor ignite an explosive.

- A further object of this invention is the provision of a device of this character which is readily placed in use, and which when used in connection with indicating mechanisms, will operate any number of timesv without being destroyed, but which when operatedin con] unction with a submarme mine, will itself be destroyed.

When used in conjunction with coast defense, the apparatus is designed to be submerged at any desired distance from the shore'and along the sea coast, so that any vessels passing thereby, either submerged or otherwise, will cause the actuation of an indic'ating mechanism upon the shore, either in a fort or signaling tower, thus giving the exact location of such vessel, and rendering it possible, in case there should be an enemys submarine, to pursue or capture such vessel, or to warn a friendly vessel of disk carrying the upper magnetic needle.

Fig. 4 is a reverse view of the same showingTthe lower permanent magnets.

ig. 5 is a similar view with the central magnet removed to show the electrical connections.

Flg. 6 is a diagrammatic view showing the method of connecting electrically the main receptacle member and the axis portion thereof.

Fig. 7 is a diagrammatic and sectional view showing the present apparatus used in conjunction with a submarine mine.

Figs. 8 and 9 are detail views of parts of the present mechanism. i' l Referring to the drawings, and more particularly to Figs. 1 to 7, the numeral 11 designatesthe hermetically sealed, preferably' brass,l casing which has disposed therein the blocks 12 of insulation which carry thejournals for the pivots 13 which in turn support the outer ring or annulus 14, which is also made of brass.

This ring is provided with the insulating connectlon 15, and is itself supported at one side by another inslatin connection 16.

One pivot member 17 1s mounted'in the lnsulatlng member 15, and coperates with the dlametrically disposed pintle 18- to support the brass receptacle or disk 19, the first mentioned pintle 17 being journaled in the strlp 20 of insulation, which constitutes a -portion of the wall of the member 19.

shaft 23, the same being insulated by the lnsulation 24 from the metal sleeve 25.

Mounted for independent rotation upon the axis 23 and also about the metal sleeve 25, is an ebonite or other insulating material disk 26, which carries upon its under face the three parallel permanent magnets 27, 28 and 29.

rlhe center magnet 28 is provided with an opening that ts over, but is out of contact with the sleeve 25, while mounted co-axially of the disk 26 is a hollow post 30 which embraces, but does not contact, the metal sleeve 25, contacting,A however, the reduced end of the center axis 21. Carried upon the upper end of the post 30 is the support 31 for the upper magnetic needle' 32.

Also carried by the disk 26 is a metal supporting plate 33 for the fork or Y-shaped member 34. The member is so disposed that the south pole of the magnet 32 is between the forks thereof, but normally pointing south, this action being due to the static power of the three controlling magnets, 27, 28 and 29.

"the member 51 which is connected b Also carried by the magnetic needle 32 are the resilient circuit closing members 35 and 36, which, as will later appear, engage either one of the terminals 34 of the member 34, and close the electrical circuit. y

Supported through the medium of the blocks 37 of insulation is the bow 38 which carries at its top the securing screw 39 to support the limiting disk 40 which prevents the unseating of the support 31 and its needle 32 when the buoyant supporting member 41 is bein transported or submerged, said disk limiting the vertical or longitudinal movement of these parts.

The circuit connections between the needle 32 and the respective conductors 47' and 48 is as follows:

The conductor 48 is connected to the intle 17, which is insulated from the annu us 14 and also the disk 19, and has connected to its inner end the conductor 49 which in turn is in engagement with the sleeve 25, and as this sleeve 25 is embraced by the resilient conductor 50, connected in turn to the metal support 33 at the under side of the disk 26, current is led to the member 34.

The two conductors 50 are supported by insulating strips 52 to the disk 26. In4 this manner, the conductors 50 are insulated therefrom. i

The negative conductor 47 is in electrical connection with the pintle 13, the annulus 14, the pintle 18, and the disk 19, its axis 23 being electrically connected thereto so that the-support 31 of the magnet 32 is electrically connected thereto. Thus, it is evident that any movement of the needle 32 will bring either one of the contacts 35 or 36 into engagement with one of the terminals 34 of the member 34 and cause the closure of the circuit.

As the three permanent `magnets 27, 28,

I and 29 are of greater power than the magnetic needle 32, and as the poles of the magnets 27, 28, and 29 are so arranged that the north poles thereof normally project north, while the north pole of the magnet 32 normally projects south, a magnetic-needle or switch controller is provided and inY which the latitude of swing permitted the m/agnetic needle 32, due to the passage thereby of any magnetic metallic object, will be regulated by the distances of the outer magnets 27 and 29 relatively to the central magnet 28.

In practice, the effect of such passing body of metal will cause the terrestrial magnetism to act upon the magnetic needle 32, endeavoring to reverse the polarity thereof, the

north pole thereof swinging toward the south pole, or either one of the outer'magnets 27 and 29, and attempting to close the magnetic field thereof, the opposite pole being attracted in a similar manner to the opposite pole of the remaining magnet 27 vor 28.

i parallel with their In this instance, t e s ark plu 53 is grounded in the partition etween t e compartments, while mounted in the compartment A is the coil box 56 and the battery 57,

so that al1 circuit connections are inclosed.

When setting these mines, wooden vessels are employed to anchor them in the desired places, the magnetic needle being so adjusted as to operate when a metallic vessel passes within a predetermined distance thereof.

Where the device is used as a defensive mine, there is-connected in circuit with the battery the usual form of time clock which opens the circuit at predetermined periods, so that the proper authorities will Vknow when the mine is rendered inoperative, and the passage of' ships thereby is safe.

What I claim as new is 1.' A circuit closer including a non-magnetic casing, a gimbal mounted in said casing and consisting of two members each insulated from the other and from the casing, a rotatable body carried by the inner member of the gimbal, said body being non-magnetic, a plurality of permanent magnets carried bodily thereby, said magnets being in oles in the same direction, a vertical sha t carried axially of the rotatable member, a magnetic needle mounted for independent movement upon the upper end of said shaft with its north pole 1n an opposite direction to the north poles of the first mentioned magnets, a Y-shaped nonmagnetic antenna carried by the rotatable body and disposed to have the terminals thereof fitting astride one end of the magnetic needle, contact members carried by the magnetic needle for engaging the antenna, .said contact members being normally held out of contact with the antenna due to the magnetic effect on the first mentioned permanent magnets upon the vmagneticv needle, and circuit connections with the shaft and antenna and insulated from each other Tvhereby the circuit is normally open.

2. A circuit closer including a non-magnetic supporting casing, a gimbal comprising two non-magnetic members mounted in said casing, a concentric support carried by the inner member ofthe gimbal, a rotatin nonmagnetic member mounted upon sai support, a sleeve surrounding and insulated from said support, a plurality of permanent magnets attached to the under side of the rotatable member and having their north poles in the same direction, a vertical pin carried by the rotatable member and having its lower end in vertical connection with the axial support, a magnetic needle mounted for independent movement upon the upper end of said pin with its north pole extended in the opposite direction of the north poles of the first permanent magnets, a Y-shaped antenna attached to the rotatable member and insulated therefrom and having its terminal disposed to fit astride and normally out of contact with the one end of the magnetic needle, a circuit connection leading from the lower end of the antenna to the middle sleeve, and circuit connections leading from the axial support whereby when the magnetic needle is in normal position the circuit is open.

In testimony whereof I arix my signature.

CESAR MARSHALL. 

